EP0721124A3 - Objective lens and optical head apparatus using the objective lens - Google Patents
Objective lens and optical head apparatus using the objective lens Download PDFInfo
- Publication number
- EP0721124A3 EP0721124A3 EP95120180A EP95120180A EP0721124A3 EP 0721124 A3 EP0721124 A3 EP 0721124A3 EP 95120180 A EP95120180 A EP 95120180A EP 95120180 A EP95120180 A EP 95120180A EP 0721124 A3 EP0721124 A3 EP 0721124A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- objective lens
- astigmatism
- axial
- optical head
- head apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/06—Simple or compound lenses with non-spherical faces with cylindrical or toric faces
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Lenses (AREA)
- Optical Head (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP06317911A JP3104780B2 (en) | 1994-12-21 | 1994-12-21 | Objective lens and optical head device using the same |
JP31791194 | 1994-12-21 | ||
JP317911/94 | 1994-12-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0721124A2 EP0721124A2 (en) | 1996-07-10 |
EP0721124A3 true EP0721124A3 (en) | 1998-04-15 |
EP0721124B1 EP0721124B1 (en) | 2002-09-11 |
Family
ID=18093431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95120180A Expired - Lifetime EP0721124B1 (en) | 1994-12-21 | 1995-12-20 | Objective lens and optical head apparatus using the objective lens |
Country Status (6)
Country | Link |
---|---|
US (1) | US5684641A (en) |
EP (1) | EP0721124B1 (en) |
JP (1) | JP3104780B2 (en) |
KR (1) | KR0181207B1 (en) |
CN (1) | CN1084911C (en) |
DE (1) | DE69528144T2 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3531024B2 (en) * | 1996-07-10 | 2004-05-24 | コニカミノルタホールディングス株式会社 | Optical system for recording and / or reproduction of optical information recording medium and objective lens |
JP3617256B2 (en) * | 1997-06-20 | 2005-02-02 | ソニー株式会社 | Optical pickup and optical pickup manufacturing method |
HU9801029D0 (en) * | 1998-05-05 | 1998-06-29 | Optilink Ab | Method and system for recording information on a holographic card |
US6829209B1 (en) | 1999-06-23 | 2004-12-07 | Matsushita Electric Industrial Co., Ltd. | Objective for optical disk, optical head device and optical information recording/reproducing apparatus both comprising the same, mold for forming lens, method for machining mold for forming lens, and shape measuring instrument |
US20010015939A1 (en) * | 2000-02-08 | 2001-08-23 | Asahi Kogaku Kogyo Kabushiki Kaisha | Objective lens for optical pick-up |
JP4083955B2 (en) * | 2000-06-12 | 2008-04-30 | パイオニア株式会社 | Objective lens, optical pickup device, and optical recording / reproducing device |
JP2002221606A (en) * | 2001-01-24 | 2002-08-09 | Sony Corp | Optical lens, method for manufacturing the same, method for manufacturing optical lens array, method for producing focus error signal and optical pickup device |
JP2003287675A (en) * | 2002-01-22 | 2003-10-10 | Konica Corp | Light convergence optical system, optical pickup device, recording and reproducing device, aberration correcting element, and objective |
JP2005077759A (en) | 2003-08-29 | 2005-03-24 | Konica Minolta Opto Inc | Semiconductor laser light source device |
CN100445770C (en) * | 2005-02-28 | 2008-12-24 | 鸿富锦精密工业(深圳)有限公司 | Object lens and optical recording/ reproducing device using same |
US20080031098A1 (en) * | 2006-04-06 | 2008-02-07 | Feihong Zhu | Servo architecture to minimize access time in optical disk drive |
JP2008065942A (en) * | 2006-09-08 | 2008-03-21 | Sony Corp | Optical pickup and optical disk device using same |
US7898750B2 (en) * | 2009-02-26 | 2011-03-01 | Corning Incorporated | Folded optical system and a lens for use in the optical system |
DE102010037636B4 (en) * | 2010-09-17 | 2015-05-21 | Kuo-Chin Huang | Conveying lens with different curvatures, light collection module and lamp device |
CN114719222B (en) * | 2021-01-06 | 2024-06-25 | 华域视觉科技(上海)有限公司 | Lens assembly, car lamp module, car lamp and vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027952A (en) * | 1974-05-14 | 1977-06-07 | U.S. Philips Corporation | Single optical lens with large aperture and large field |
US4789978A (en) * | 1985-12-04 | 1988-12-06 | Mitsubishi Denki Kabushiki Kaisha | System and method of astigmatism correction in an optical head apparatus |
US4915484A (en) * | 1987-04-06 | 1990-04-10 | Matsushita Electric Industrial Co., Ltd. | Anamorphic single lens |
US4968874A (en) * | 1988-05-31 | 1990-11-06 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Optical pickup with astigmatism correcting lens |
EP0594952A1 (en) * | 1992-10-26 | 1994-05-04 | Matsushita Electric Industrial Co., Ltd. | Focus error detecting element and optical head using the same |
EP0605923A1 (en) * | 1993-01-04 | 1994-07-13 | Koninklijke Philips Electronics N.V. | Beam-shaping optical element, and radiation source unit and scanning unit including said element |
US5365504A (en) * | 1990-10-23 | 1994-11-15 | Asahi Kogaku Kogyo Kabushiki Kaisha | Optical disk apparatus, and construction of optical disk |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4886959A (en) * | 1986-11-27 | 1989-12-12 | Canon Kabushiki Kaisha | Optical information reproducing apparatus |
-
1994
- 1994-12-21 JP JP06317911A patent/JP3104780B2/en not_active Expired - Lifetime
-
1995
- 1995-12-11 US US08/570,639 patent/US5684641A/en not_active Expired - Lifetime
- 1995-12-19 KR KR1019950051730A patent/KR0181207B1/en not_active IP Right Cessation
- 1995-12-20 DE DE69528144T patent/DE69528144T2/en not_active Expired - Fee Related
- 1995-12-20 EP EP95120180A patent/EP0721124B1/en not_active Expired - Lifetime
- 1995-12-21 CN CN95121125A patent/CN1084911C/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027952A (en) * | 1974-05-14 | 1977-06-07 | U.S. Philips Corporation | Single optical lens with large aperture and large field |
US4789978A (en) * | 1985-12-04 | 1988-12-06 | Mitsubishi Denki Kabushiki Kaisha | System and method of astigmatism correction in an optical head apparatus |
US4915484A (en) * | 1987-04-06 | 1990-04-10 | Matsushita Electric Industrial Co., Ltd. | Anamorphic single lens |
US4968874A (en) * | 1988-05-31 | 1990-11-06 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Optical pickup with astigmatism correcting lens |
US5365504A (en) * | 1990-10-23 | 1994-11-15 | Asahi Kogaku Kogyo Kabushiki Kaisha | Optical disk apparatus, and construction of optical disk |
EP0594952A1 (en) * | 1992-10-26 | 1994-05-04 | Matsushita Electric Industrial Co., Ltd. | Focus error detecting element and optical head using the same |
EP0605923A1 (en) * | 1993-01-04 | 1994-07-13 | Koninklijke Philips Electronics N.V. | Beam-shaping optical element, and radiation source unit and scanning unit including said element |
Non-Patent Citations (1)
Title |
---|
SUNOHARA M ET AL: "Single Lens CD Player Pickup System using a Bi-aspheric Molded Glass Lens", IEEE TRANSACTIONS ON CONSUMER ELECTRONICS., vol. ce-33, no. 4, November 1987 (1987-11-01), NEW YORK US, pages 520 - 530, XP002055996 * |
Also Published As
Publication number | Publication date |
---|---|
JP3104780B2 (en) | 2000-10-30 |
EP0721124B1 (en) | 2002-09-11 |
KR960025430A (en) | 1996-07-20 |
DE69528144T2 (en) | 2003-01-02 |
JPH08179198A (en) | 1996-07-12 |
EP0721124A2 (en) | 1996-07-10 |
CN1084911C (en) | 2002-05-15 |
CN1150296A (en) | 1997-05-21 |
US5684641A (en) | 1997-11-04 |
DE69528144D1 (en) | 2002-10-17 |
KR0181207B1 (en) | 1999-04-15 |
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